About this 3D model

Made screwless tray for cables. Tray size 20mm x 30mm. Supported few tables height: 15mm, 20mm, 25mm, 30 mm and 35 mm. Have different trays length: 50mm, 100mm, 150mm and 200mm tray. Recommended seam exclusion zone. In the parametric model I cannot block seam placement in this area. I did not have this issue on my prints, but excluding this zone can improve the connection between parts. Mark it on both sides. Printed without any support, without brim.